Metronidazole is used to treat bacterial infections in different areas of the body. It is also used to treat infections caused by protozoa (eg, trichomoniasis and amebiasis) and infections caused by bacteria that do not need oxygen to survive. The extended-release tablets are used to treat women with vaginal infections (bacterial vaginosis). Flagyl (metronidazole) is a prescription antibiotic used to treat anaerobic bacterial infections, trichomoniasis, and more. A common Flagyl dosage for adults is 1 tablet (500 mg) by mouth 2 to 4 times a day for 7 to 10 days. Metronidazole is used to treat a certain type of vaginal infection (bacterial vaginosis) in women who are not pregnant. Learn about side effects, drug interactions, dosages, warnings, and more. Metronidazole is a prescription antibiotic medication prescribed for the treatment of a variety of parasitic and bacterial infections of the vagina, gynecological area, skin, intra-abdominal cavity, blood, bone, joint, nervous system, and heart. Metronidazole, sold under the brand name Flagyl and Metrogyl among others, is an antibiotic and antiprotozoal medication. [10] It is used either alone or with other antibiotics to treat pelvic inflammatory disease, endocarditis, and bacterial vaginosis. [10] It is effective for dracunculiasis, giardiasis, trichomoniasis, and amebiasis. [10] Metronidazole is used to treat infections of the reproductive system, gastrointestinal (GI) tract, skin, heart, bone, joint, lung, blood, nervous system, and other areas of the body. It is also used to treat certain sexually transmitted diseases (STDs). Metronidazole is also used to treat bacterial vaginosis (an infection caused by too much of certain types of harmful bacteria in the vagina. Find patient medical information for Metronidazole (Flagyl, Likmez) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Metronidazole tablets, 250 mg or 500 mg is an oral formulation of the synthetic nitroimidazole antimicrobial, 2-methyl-5-nitro-1H-imidazole-1-ethanol, which has the following structural formula: Metronidazole Capsules or Tablets Metronidazole is a medication that treats infections caused by bacteria or parasites. The brand name of this medication is Flagyl®. You can take this tablet or capsule by mouth with a glass of water. Metronidazole is an antibiotic used to fight bacteria in your body. Learn about side effects, interactions and indications.